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Rotor Bar Testing – Single Phase Rotation

Test Procedure While the motor is in an assembled/disconnected state, apply low voltage single phase power to any two of the motor leads and slowly rotate the shaft. While rotating the shaft, observe an ammeter

Rotor Bar Testing – Rotor Rated Flux

Test Overview A rotor rated flux test or high-current excitation test, often performed with a core tester acting as the power source, can be administered with some degree of success for detection of major rotor

Rotor Bar Testing – Growler (magnetic film)

Test Overview A growler test, utilizing magnetic viewing film, can help a technician visualize the bars of a rotor. This test utilizes a portable growler for exciting the rotor and magnetic field viewing film for